Tap water in CO14, TendringAmmonia is over the limit.Very hard.
Supplied by Anglian Water. 1 substances, latest on 20 January 2015. Ammonia came in above the legal limit. Everything else passed.
0.0 / 10
The tank is as full as the score. The specks are the minerals that make water hard.
What to do about it
Hard water: compare softener quotes
At 359 mg/L a softener is the only thing that stops limescale. Filters do not soften water.
It pays for itself in most homes at this hardness, through a boiler that stays efficient and appliances that last.
Waterdrop G3P600 Reverse Osmosis
£550typical price
Maximum contaminant removal including PFAS and fluoride
Waterdrop 10UA Under Sink
£70typical price
High-volume under-sink filtration without RO complexity
We earn a commission if you buy through these links, at no extra cost to you. It never changes which product we put first. How we make money
What's in a glass of CO14 water
Every bubble is a substance the lab measured. The higher it floats, the closer it came to its legal limit, the dashed line at the top.
Ammonia is over its legal limit, at 185% of it.
- Ammonia185%
All 1 results as a table
| Substance | Result | Legal limit | Share of limit |
|---|---|---|---|
| Ammonia | 0.925 mg/L | 0.5 mg/L | 185% |
359mg of limescale minerals in every litre
This is the water that furs up kettles
Very hard on the UK scale. It is fine to drink. It is hard on boilers, showers, skin and anything that heats water, and a jug or tap filter will not change that.
Softener quotes for CO14
Leave your details and we will email you when we can match you with installers who cover CO14. No obligation.
Request a free assessment and we'll come back to you with local installer options for your area.
100%
free, no obligation
shared only with your consent
Your coastal water is the Hamford Water, rated moderate
The Environment Agency rated the Hamford Water as moderate for ecological health in its 2025 assessment, meaning the coastal water is noticeably changed by pollution or engineering. It is held back by insects and other small river life and algal blooms. It fails the chemical test, as every river, estuary and stretch of coast in England does, because of long-lasting pollutants such as mercury, PFOS (a forever chemical) and old flame retardants.
None of this is a test of your tap water. Environment Agency record · River health across England
CO14 in short
Tap water in CO14 (Tendring) is supplied by Anglian Water in the Tendring Central zone and scores 0.0 out of 10, against an England and Wales average of 9.0. 1 of 1 tested substances was close to or over a limit. The latest sample is from 20 January 2015.
- The newest sample here is from January 2015That is over 11 years old, so treat this page as a record of past results rather than today's tap water.
- Ammonia was measured at 0.93 mg/L, 85% over the UK limitIt is the only one of 1 tested substances to go over its limit. See the full results
- The lowest score of the 7 areas tested in TendringCO14 scores 0 out of 10. The best in Tendring, CO11, scores 9.7.
Questions about CO14 water
Is CO14 tap water safe to drink?
Based on the latest tests, CO14 (Tendring) water scores 0/10, which is below average and may need attention. 1 of 1 tested contaminants exceeded recommended levels. Water is supplied by Anglian Water.
What contaminants are in CO14 water?
We tested 1 contaminants in CO14 water. 1 were flagged, including Ammonia.
Who supplies water in CO14?
CO14 (Tendring) is supplied by Anglian Water. You can view their full profile and compliance data on our supplier page.
Is CO14 water hard or soft?
Water in CO14 (Tendring) has a hardness of 359 mg/L CaCO3, which is classified as very hard. Hard water can cause limescale buildup. A water softener or filter jug may help.
Should I use a water filter in CO14?
With 1 contaminant above recommended levels in CO14, a water filter could help. A filter jug or under-sink filter can reduce most common contaminants. See our filter recommendations for your area.
Are there PFAS forever chemicals in CO14 water?
No PFAS (forever chemicals) result is attached to the tap-water tests for CO14, and the Environment Agency has no PFAS detections in rivers or groundwater within 10 km of it. That reflects where sampling has happened as much as the water itself.
How clean is the coastal water near CO14?
The Environment Agency rated the Hamford Water as moderate for ecological health in its 2025 assessment, meaning the coastal water is noticeably changed by pollution or engineering. It is held back by insects and other small river life and algal blooms. It fails the chemical test, as every river, estuary and stretch of coast in England does, because of long-lasting pollutants such as mercury, PFOS (a forever chemical) and old flame retardants. This is a rating of the coastal water, not of tap water in CO14, which is treated before it reaches homes.
Keep reading
- Best Water Softener UKHarvey, Kinetico, BWT, Monarch and Water2Buy compared, with real costs
- Do I Need a Water Softener?The hardness bands, the symptoms, and a postcode check
- UK Water Hardness MapIs your water hard or soft, and does it matter?
- Best Water Filters UKEvery filter type compared on what it actually removes
- Do I need a water softener?The hardness bands, the symptoms, and when the answer is no
- Best water softener UKHarvey, Kinetico, BWT, Monarch and Water2Buy compared
- Water softener costUnit, fitting and salt, and how long the payback takes
- Installation explainedWhere it goes, the bypass tap, the drain, DIY or plumber
- Harvey vs KineticoThe two premium twin-cylinder brands, side by side
- Softener salt guideTablet, block or granular, and how much you get through
- Salt-free softenersConditioners and electronic descalers, honestly assessed
How to test your waterBest water filtersFilter shower headsWater testing kitsUK water rankingsWater hardness checkerWater hardness map
Get alerts for your area
We'll email you when water quality data changes for CO14.